This would be the content for sender_canonical and recipient_canonical respectively:

recipient_canonical:
/^((dbsupport|helpdesk).*)thisdomain[.]com$/ admins@thatdomain.com

sender_canonical
/^(.*)thisdomain[.]com$/ ${1}thatdomain.com


Also, can you tell me is this can be done using virtual maps?
I apologize for all these questions, but I am under a lot of stress right now. If I don't get this working, I will be in trouble.

Thanks.
--Willie

What was the original command for the output you got:? The sender is still not changed, but on the commandline a is working? What is in /var/log/mail on box1?

Small change:
to get rid of box1 in the address. I suggest to look into regular expressions.I don't know, I never used them. But AFAICS the idea is different: you will host a virtual thatdomain.com on thisdomain.com then, but in your original post you specified "rewrite the sender's address", not hosting a domain.

Hello Reuti:

Thanks for your updates. I first thought that I needed to rewrite the sender's address, but things have changed. What I really need to do is tell postfix that every email sent to


dbsupport@thisdomain.com
and
helpdesk@thisdomain.com

to

be sent to admins@thatdomain.com

Thanks.
--Willie

If I dont pull this one off, I think I better start looking for another job. I am serious and nervous at the same time.

The recipient_canonical rule I posted should do it. You can also check this: http://www.postfix.org/ADDRESS_REWRITING_README.html

Hello Reuti:

Unfortunately, your suggestion did not work for me.
I apologize for that. At the same time, I want to really thank you for your help.

I will keep searching on how to get this to work. If you happen to have any other suggestion(s), feel free to let me know.

Thanks.
--Willie

This is what if in /var/log/mail in box1:


Dec 28 16:10:25 box1 postfix/pickup[19291]: 54D258F726: uid=0 from=<root>
Dec 28 16:10:25 box1 postfix/cleanup[23489]: 54D258F726: message-id=<4D1A5241.mailIBZ11LRR6@box1.thisdomain.com>

Dec 28 16:10:25 box1 postfix/qmgr[4846]: 54D258F726: from=<root@box1.thisdomain.com>, size=438, nrcpt=1 (queue active)
Dec 28 16:10:25 appatl7 postfix/cleanup[23489]: 5CE3E8E133: message-id=<4D1A5241.mailIBZ11LRR6@box1.thisdomain.com>

Dec 28 16:10:25 box1 postfix/local[23766]: 54D258F726: to=<root@box1.thisdomain.com>, orig_to=<root>, relay=local, delay=0, status=sent (forwarded as 5CE3E8E133)
Dec 28 16:10:25 box1 postfix/qmgr[4846]: 5CE3E8E133: from=<root@box1.thisdomain.com>, size=596, nrcpt=1 (queue active)
Dec 28 16:10:25 box1 postfix/qmgr[4846]: 54D258F726: removed

Dec 28 16:10:25 box1 postfix/smtp[23492]: 5CE3E8E133: to=<helpdesk@thisdomain.com>, orig_to=<root>, relay=box2mail.thisdomain.com[10.10.2.75], delay=0, status=sent (250 2.0.0 Ok: queued as 8500358075)
Dec 28 16:10:25 box1 postfix/qmgr[4846]: 5CE3E8E133: removed

I hope it still matters.
Thanks.
--Willie

Sure, this looks already half-working.

You are already rewriting "to=<root@box1.thisdomain.com>" to "<helpdesk@thisdomain.com>" - correct?

When it's not recipient_canonical, where is this rewritten?

You would now like to convert "<helpdesk@thisdomain.com>" to "<admins@thatdomain.com>" - right?

Can you grep through all files in /etc/postfix where helpdesk pops up? Maybe there is a douple entry for recipient_canonical_maps or alike.

Hello Reuti:

This is the result of doing the grep:

/^((dbsupport|helpdesk).*)thisdomain[.]com$/ admins@thatdomain.com

that is the content of the recipient_canonical file.

helpdesk only shows there.

The rewriting comes from an alias in /etc/alias as root: helpdesk@thisdomain. So that is happening.

I really do not want to convert "<helpdesk@thisdomain.com>" to "<admins@thatdomain.com>". What my boss wants is for all emails sent to
helpdesk@thisdomain.com and dbsupport@thisdomain.com to go to admins@thatdomain.com

Thanks.
--Willie

Well, then Google "postfix forward email" - there are several hits which look promising. But from the philosophical point of view, I would tend to stick to a canonical map (i.e. it's personal taste). In fact, I use this to route emails to sgeadmin (from the queuingsystem) and root to my own account.

Hello Reuti:


I am googling about it right now.

I hope to solve this soon.

Thanks a lot for all of your help.


--Willie

I know its way too late, but I had the same problem and resolved it yesterday. The key is to use Postfix Advanced Content Filtering http://www.postfix.org/FILTER_README.html . This is basically a redirect of all mails from Postfix to a different SMTP, which processes the content (header and body) and then it injects the mail back to Postfix. So you basically need to write a complete SMTP server and SMTP client to do this in Postfix - quite ridiculous IMO. But I did it this way, because it was quite simple to achieve in Python.

A simple script that does it is now committed to https://github.com/MiroslavHoudek/postfix-filter-loop . You can get it, start it, configure Postfix (as per Readme on that Github) and do whatever you want with all email via Python scripting.